椰壳灰基聚硅氧烷泡沫的制备与性能表征。

Fabrication and characterization of thermally-insulating coconut ash-based geopolymer foam.

机构信息

Posgrado de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, 58000 Morelia, Michoacán, Mexico; Geology Department, Faculty of Science, New Valley University, Egypt.

Raw Building Materials Technology and Processing Research Institute, Housing and Building National Research Center (HBRC), Cairo, Egypt.

出版信息

Waste Manag. 2018 Oct;80:235-240. doi: 10.1016/j.wasman.2018.09.022. Epub 2018 Sep 18.

DOI:10.1016/j.wasman.2018.09.022

PMID:30455004

Abstract

This study aims at synthesizing porous coconut ash (CA)-based geopolymer foam with high thermal insulation property. Sodium hydroxide (NaOH), alumina slag (AS) and water contents as the main parameters, which affect the performance hardened CA, have been studied. The porosity was developed by hydrogen gas resulted from the interaction of Al metal, in AS, with NaOH. The compressive strength, bulk density, porosity and thermal conductivity were evaluated. The results proved that the AS has a potential impact on the reduction of thermal conductivity of CA-based geopolymer foam by creation of high porous system. Open celled hardened CA-based geopolymer with high porosity (∼87%), low thermal conductivity (∼0.045 W/m·K), compressive strength (1.3 MPa) and bulk density (∼0.60 g/cm) was obtained when 7% AS (by weight of CA powder) and water to CA powder ratio of 0.4 were used.

摘要

本研究旨在合成具有高热绝缘性能的多孔椰子灰（CA）基地质聚合物泡沫。研究了氢氧化钠（NaOH）、氧化铝渣（AS）和水含量等主要参数对硬化 CA 性能的影响。通过 AS 中的 Al 金属与 NaOH 的相互作用产生的氢气来开发孔隙率。评估了抗压强度、体积密度、孔隙率和导热系数。结果表明，AS 通过创建高多孔体系对降低 CA 基地质聚合物泡沫的导热系数具有潜在影响。当使用 7%的 AS（以 CA 粉末重量计）和水与 CA 粉末的比例为 0.4 时，获得了具有高孔隙率（约 87%）、低热导率（约 0.045 W/m·K）、抗压强度（1.3 MPa）和体积密度（约 0.60 g/cm）的开孔硬化 CA 基地质聚合物。